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PartsTable / COMPONENT / 72-2051-181
72-2051-181 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN, hole_diameter: 0.945 INCHES MINIMUM AND 0.955 INCHES MAXIMUM IN, overall_diameter: 1.537 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-281-3552, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
72-2051-181
NSN: 5310-00-281-3552
FSC: 5310
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
hole_diameter0.945 INCHES MINIMUM AND 0.955 INCHES MAXIMUM IN
overall_diameter1.537 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-281-3552
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 72-2051-181 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THICKNESS: 0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 1.537 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.945 INCHES MINIMUM AND 0.955 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
OVERALL DIAMETER1.537 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.945 INCHES MINIMUM AND 0.955 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
1080-3Interchangeable
interchangeable cross-reference
interchangeable
B44-3 3-16X5-16SPInterchangeable
interchangeable cross-reference
interchangeable
TV15-3-16ID1-16WInterchangeable
interchangeable cross-reference
interchangeable
B44-3Interchangeable
interchangeable cross-reference
interchangeable
B94.9Interchangeable
interchangeable cross-reference
interchangeable
GGG-T-70 TY2SEBSTBInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 72-2051-181?
72-2051-181 is a WASHER,FLAT.
What parts can replace 72-2051-181?
There are 17 known substitutes for 72-2051-181: 1080-3, B44-3 3-16X5-16SP, TV15-3-16ID1-16W and 14 more. Substitute compatibility should be verified for your specific system.
Is 72-2051-181 still available?
72-2051-181 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026